Create Tar and GZip files under Unix

Hi All
I have 2 tar files and inside a Gzip file (actually its folder) that i got from a Unix user to check the code for him and find some problem.
I decompress the Tar file and use 7-ZIP to open the Gzip file and Extract all folders and files.
I found the code problem and change it but now when i try to pack it back into GZIP and TAR then the system dont recognize it as Unix file.
In the properties of the Tar file it used to say UNIX but now it say FAT because i work under windows.

Does anyone know how to change this property of the host or get me solution to Tar the files and keep Unix inviroment?
I download CYGWIN and worked threw there on TAR files but still it doesent say UNIX under host and the system cant upgrade it

Hope someone can help

Welcome to the forum.

With most of the windows tools ( winrar and 7-zip ) you can only extract the Unix-like archives and not re-pack them.

Cygwin, However does the same job like you are on Unix like environment.
If you have a tar.gz archive, I would suggest to extract and re-pack in cygwin only.

Although there is a GNU tar for win32 systems you might want to look.